<template>
    <div class="shopcar-container">
      <div class="goods-list">
          <!-- 商品列表区域 -->
        <div class="mui-card" v-for="(item, i) in goodslist" :key="item.id">
	  	    <div class="mui-card-content">
	  	      <div class="mui-card-content-inner">
	  	  	    <mt-switch 
                    v-model="$store.getters.getGoodsSelected[item.id]"
                    @change="selectedChanged(item.id, $store.getters.getGoodsSelected[item.id])"></mt-switch>
                <img :src="item.thumb_path" >
                <div class="info">
                    <h3>{{ item.title }}</h3>
                    <p>  
                    <span class="price">
                        ￥{{ item.sell_price }}
                    </span>
                    <numbox :initcount="$store.getters.getGoodsCount[item.id]" :goodsid="item.id" ></numbox>
                    <!-- 问题：如何从购物车中获取商品的数量
                        1. 我们可以先创建一个 空对象，然后循环 购物车中所有商品的数据，把 当前循环这天商品的 id 作为对象的属性名， count值作为对象的属性值
                           这样，当把所有的商品循环一遍，就会得到一个对象，  { 88:2, 90:4, 89:3 }  
                     -->
                    <a href="#" @click.prevent="remove(item.id,i)">删除</a>
                    </p>
                 </div>
	  	      </div>
	  	   </div>
	    </div>
      </div>
      <!-- 商品结算区域 -->
        <div class="mui-card">
	      <div class="mui-card-content">
	        <div class="mui-card-content-inner jiesuan">
	    	  <div class="left">
                  <p>总计(不含运费)</p>
                  <p>已勾选商品 <span class="red">{{ $store.getters.getGoodsCountAndAmount.count }}</span> 件,总价 <span class="red">￥{{ $store.getters.getGoodsCountAndAmount.amount }}</span>  </p>
              </div>
              <mt-button type="danger">去结算</mt-button>
	        </div>
	     </div>
       </div>
    </div>
</template>

<script>
    import numbox from '../subcomponents/shopcar_numbox.vue'
    export default {
        data(){
            return {
                goodslist: []
            }
        },
        created(){
            this.getGoosList()
        },
        methods:{
            getGoosList() {
                // 1.获取到store中所有商品的id,然后拼接出一个用逗号分割的字符串
                var idArr = []
                this.$store.state.car.forEach( item => idArr.push(item.id))
                // 如果购物车中没有商品则 直接返回， 不需要请求结构，否则会报错
                 if( idArr.length <= 0 ){
                     return
                 }
                // 获取购物车商品列表
                this.$http.get('api/goods/getshopcarlist/' + idArr.join(",")).then( result => {
                    if(result.body.status === 0){
                        this.goodslist = result.body.message
                    }
                })
            },
            remove(id,index){
            // 点击删除，把商品从store中根据传递的id 删除，同时把当前组件中的goodsList中对应的商品，通过index删除
                this.goodslist.splice(index, 1)
                this.$store.commit('removeFromCar',id)
            },
            selectedChanged(id,val){
                // 每当点击开关，把最新的开关状态同步到store 中
                this.$store.commit('updateGoodsSelected',{ "id":id, "selected": val })
            }
        },
        components:{
            numbox
        }
    }
</script>

<style lang="scss" scoped>
    .shopcar-container{
        background-color: #eee;
        // 出现了盒子塌陷，需要清除浮动
        overflow: hidden;

        .goods-list{
            .mui-card-content-inner{
                display: flex;
                align-items: center;
            }
            
            img{
                width: 60px;
                height: 60px;
            }
            h3{
                font-size: 13px;
                margin: 0;
                padding-bottom: 5px;
            }
            .info{
                display: flex;
                flex-direction: column;
                justify-content:space-between;
                margin-left: 3px;
                .price{
                    color: red;
                    font-weight: 700;
                }
                p{
                    margin: 0;
                    padding: 0;
                }
            }
        }
        .jiesuan{
            display: flex;
            justify-content: space-between;
            align-items: center;
            .red{
                font-size:16px;
                font-weight: 700;
                color: red;
            }
        }
    }
</style>